World No. 3 Murray lost to the recently-retired American in straight sets, eventually succumbing 6-2 6-3 in a semi-final match played with reduced levels of intensity.

"Andy hasn't hit that many balls the last few months," Murray said afterwards. "Maybe his timing was a little bit off, but he still hits the ball very well.

"It was only a few months ago he was making a decent run at the US Open."

Roddick, meanwhile, admitted that he would have been in trouble if the match had been extended to a full three sets. He also ruled out any prospect of coming out of retirement.

"If we had gone three sets I would've had a full body cramp and it would've been awkward for all of you," he joked. "Andy was nice to me tonight.

"There's no comeback. I don't miss the travel at all.

"It's nice coming here and seeing familiar faces. I still enjoy hitting tennis balls, but I haven't lost that part of it. I haven't lost any of the innocent parts of tennis. I just do it in front of less people."

Roddick will now face Nicolas Almagro in the final of the exhibition, after the Spaniard beat John Isner in the other semi-final.